Bowling pin reconditioning machine



June 25, 1940.

A. A. PIZZOT TI 2,205,541

BOWLING PIN RECONDITIONING MACHINE I Filed Dec. 50, 1938 3 Sheets-Sheet1 Inventor ATT/L /0 A. PlzzoTTl,

By 4 M. 5m

A ttomeys June 25, 1940. ZZ T 2,205,541

BOWLING PIN REC ONDITIONING MACHINE Filed Dec. 30, 1938 s Sheets-Sheet 2I k Inventor ,4TT/L [0 A. P/zzoTT/,

A tiomeys June 25, 1940. A A PI 2,205,541

BOWLING PIN RECONDITIONING MACHINE Fi 1938 3 Sheets-Sheet 3 A ttomeysPatented June 25, I940 UNITED STATES PATENT OFFICE a? o 1 Claim.

' This invention relates to a reconditioning machine especially'adaptedfor refinishing bowling pins, either the duck pin, candle pin, or tenpin type, and has for the primary object the provision of a device ofthis character which will be extremely simple in construction and easyto operate for refinishing the ends or bases as well as the sides ofpins without the danger of chipping, splitting, or otherwise damagingthe pins and which will permit scars on the pins to be easily andquickly removed for restoring the pins in perfect condition for furtheruse.

With these and other objects in view, the invention consists in certainnovel features of construction, combination and arrangement of parts tobe hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had tothe following description and accompanying drawings, in which Figure 1is a, side elevation illustrating a bowling pin reconditioning machineconstructed in accordance with my invention.

Figure 2 is a top plan view illustrating the same.

Figure 3 is a fragmentary vertical sectional view illustrating thegrinding means for reconditioning the base or supporting end of a pinand showing a portion of the support for the pin during the refinishingoperation.

Figure 4 is a transverse sectional view taken on the line 4-4 of Figure3.

Figure 5 is a transverse sectional view showing the refinishing discwith the blades thereon for creating a suction for taking away grindingsand depositing said grindings in a bag.

Figure 6 is a side elevation illustrating the support for a ten pin orduck pin.

Figure '7 is a transverse sectional view, taken on the line 1-1 ofFigure 6.

Figure 8 is a transverse sectional view taken on the line 88 of Figure6. 7,

Figure 9 is a fragmentary vertical sectional view showing one of theholders of the support for the pin, taken on the line 99 of Figure 7.

Referring in detail to the drawings, the numeral :5 indicates a base ofany conventional construction carrying a stand 6 on which is mounted anelectric motor 1, the shaft of which has secured to one end a disc 8provided with a peripheral flange 9 on which is mounted a series of fanblades Ill. The disc 8 operates within a sectional casing ll,- eachsection being of annular formation and including a base portion [2bolted or otherwise secured on the base 5. One of the sections has anannular openingto exposethe major portion of' one side face of the discand relative to the disc 8 or the abrasive material thereon.

The guard plate is removably mounted on the casing for the purpose ofgaining access to the abrasive material for the purpose of replacing thelatter when worn and damaged.

A discharge neck It is formed on the casing and hasdetachably connectedthereto a collecting bag H in which the air under pressure from the fanblades passes and carrying therewith the grindings The collecting bag llbeing remov-- able from the neck l6 may be emptied of the grindingswhenever desired. A pin support or rack I8 is carried by the base 5 andconsists of spaced brackets 19 supporting a rod or shaft 20 on which arejournaled supporting arms 2| connected by a brace 22 and terminating inpin engaging portions 23, one of which is formed of fork shape and theother of annular formation having a tapered bore 24 to receive the baseend of a pin, as clearly shown in Figure 6, with the base exposed forcontact with the abrasive material on the disc 8 within the slot l5. Oneof the supporting arms 2| operates between spaced lugs 25 formed on oneof the brackets 19 for limiting the pivotal movement of the arms on theshaft 20. The brace connecting the arms causes said arms tomove inunison and also provides an efficient hand grip for the operator to movesaid arms backward and forward which brings about the movement of thebase of the pin inwardly and outwardly of the slot l5 against theabrasive material of the disc 8, and the latter being in rotation bringsabout efficient refinishing of the base of the pin to remove blemishes,scars and the like therefrom without the danger of splitting or chippingthe pin and reconditioning of the pin so that it will rest evenly on abowling floor. The arms 2| also may have a limited sliding movementendwise of the shaft 20 so that the base of the pin may be moved towardand from the abrasive material.

The tapered bore 24 of the pin engaging portion 23 of one of the arms 2|will form an effective seat for the pin by frictionally engagingtherewith and with the forked portion engaging the head end of the pinthe latter will be supported in such a way that its base will be broughtin contact properly with the abrasive material to bring about efiicientrefinishing of the base.

The brackets i9 may be adjusted on the base 5 so that the rack l8 may beadjusted relative tothe abrasive disc for refinishing the differenttypes of pins as above described, the brackets l9 being secured in placeby bolts which may extend through diiferent openings provided in saidbase.

The other end of the shaft of the motor 1 has secured thereto asubstantially conical shaped chuck 21 to receive the head end of a pinand spaced a selected distance therefromand in axial alignment therewithis a pointed pin 28 carried by a standard 29 to engage with the base endof a pin and form a support therefor while the head end is received inthe chuck 21. It is to be understood that the bowling pin may rotate onthe pin 28 and the latter may be adjusted endwise of the standard 29 andheld in any of its adjusted positions by a handle 29' provided thereon.A bowling pin when adapted to the chuck 2'! and the pin 28 with themotor 1 in operation may readily have its walls refinished by sanding,the operator bringing abrasive material in engagement with the wallsduring the rotation of the bowling pin so that bruises, indentations andthe like may be removed without the danger of splitting or chipping thebowling pin.

When reconditioning a candle type pin, as indicated by the character Asupporting arms are used on the rack each with bifurcated or forkedends, as clearly shown in Figure 2, and a centering arcuately curvedfinger 30 is adjustably mounted on the brace of the pin supporting rackand is adapted to be brought in engagement with the candle type pinintermediate the ends of the latter.

It is believed that the simplicity and advantages of my invention willbe perfectly apparent to those skilled in the art to which such a devicerelates, and while I have herein set forth a satisfactory embodiment ofmy invention, it is to be understood that such changes therefrom asfairly fall within the scope of my claim may be resorted to whendesired.

Having thus described my invention, what I claim is:

A bowling pin reconditioning device comprising a horizontally arrangedshaft, means for supporting said shaft, arms journaled on said shaft, abar connecting said arms for movement in unison, one of said armsincluding a forked portion to receive a bowling pin and the other armincluding an annular portion having beveled walls to receive andfrictionally fit the bowling pin, a plate formed on said means, andspaced lugs formed on the plate and lying in the path of movement ofsaid latter-named arm for limiting the swinging movement thereof on theshaft in opposite directions and permitting said arms to slide endwiseof the shaft.

A'I'I'ILIO A. PIZZOTTI.

